Scholarlink

This paper aims to develop enhanced noise measurement methods for use in the noise certification testing of civil aircraft. It also analyzes numerical predictions of excess attenuation (EA) minus 6dB caused by the effects of the plate and the ground. Predictions by Boundary Element Method (BEM) and Finite Element Method (FEM) are provided for the effects of plate thickness, diameter, and ‘daisy’ plate contour design. Additionally, it is noted that noise measurements using ground-board mounted microphones are influenced by the acoustic impedance of the surrounding ground surface. Measurements conducted under realistic flight test conditions and anechoic chamber testing were utilized to evaluate the EA on the top surface of the ground-board.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Acoustic Behaviour of Ground-Board Mounted Microphones for Outdoor Aircraft Noise Testing

  • 会议论文

  • 发表日期：

    2025年

查看全文
  • Wei Dai,
  • Yongbo Hou

摘要

This paper aims to develop enhanced noise measurement methods for use in the noise certification testing of civil aircraft. It also analyzes numerical predictions of excess attenuation (EA) minus 6dB caused by the effects of the plate and the ground. Predictions by Boundary Element Method (BEM) and Finite Element Method (FEM) are provided for the effects of plate thickness, diameter, and ‘daisy’ plate contour design. Additionally, it is noted that noise measurements using ground-board mounted microphones are influenced by the acoustic impedance of the surrounding ground surface. Measurements conducted under realistic flight test conditions and anechoic chamber testing were utilized to evaluate the EA on the top surface of the ground-board.